Comparing Number of Members

New Member

Our organisation would like to compare the number of members between 2017 and 2018.
The aim is to see whether number of members has increased significantly or not.
The data will be transformed into monthly data (total of members by month).
What statistical technique can be use? Is 2 sample t-test appropriate?

TS Contributor

Without the transformation into monthly data, a Chi² test would have seemed useful (compare the 2 frequencies, with the Null hypothesis that frequency 2017 = frequency 2018). If you use 12 monthly frequencies instead, then you want to compare January 2017 with January 2018, February 2017 with February 2018 etc., I suppose? That would mean to use paired samples t-test rather than 2-sample t-test.

If you use 12 monthly frequencies instead, then you want to compare January 2017 with January 2018, February 2017 with February 2018 etc., I suppose? That would mean to use paired samples t-test rather than 2-sample t-test.